Liquid-flow regulator for centrifuges



Dec. 16, 1930. B. R. WRIGHT LQUID FLOW REGULATOR FOR CENTRIFUGES 'Filed April 30, 1928 Patentedy Dec. 16, 1930 l UNITEDSTATES? Paretil OFFICE BERT R. WEIGHT, POUGHKEEPSIE, NEW YORK, ASSIGNOR TO THE DE LAVALSEPA- RATOR COMPANY, OF NEWVYORK, N. Y., A CORPORATION F NEW JERSEY lLIQUID-mow Vaneunaroa ron GENTRIFUGES Appneann mea April 30,

This invention relates to iioats for control ling the flow of liquid to a centrifugal ma,- chine.. f u

The obj ect of`theinvention is to provide al oat thatu will not'pulsate (dance up and down) rock or'have other irregular or vibratory motions, but which will change its verticall position slowly and to the substantially imperceptible degree required to regulate the flow, thereby not only insuring a uniform feed to the centrifuge, but also avoiding spatter` ing, overflow of the regulating cup land other objectionable actions characteristic of the operation of ordinary floats.

The drawing is a vertical sectional view of a float valve and appurtenant parts embodying my invention.

Below the lower end of a tube a from a supply can (not shown) is a receiving cup Z) provided with an outlet tube which comprises a contracted lower neclr 0 extending below the cup, anl enlarged upper extension d, and an annular shoulder connecting these parts which restson the bottom of the cup. The extension d has holes e ator near its bottom, through which holes the liquid flows from cup c into the outlet tube. Loosely fitting in and closing the top of the extension is a plug f.

The float comprises an external shellV g and an internal inverted cylinder it, which together form a hollow body having a cylindrical recess extending upward from its bottom. The cylinder h fits loosely around the Y extension d.

In operation, liquid ows from the tube a The space between the plug f and the top of the cylinder t acts as a dash potto stop sudden vertical movements and so prevent dancing. After the float reaches the position re- 1928. Serial No. 273,912.

quired to give the desired rate of flow, it re-V mains almost stationary, the variations in veri tical position being slight and substantially imperceptible. v n

Having'now fully described myin'vention, what I claim and desire to protect by Letters combination with a cup having anl outlet noz zle and, extending upward from the bottom of the cup,a cylindrical member with a closed top, of a float having, projecting inward froml the bottom thereof, a cylindrical member adapted to 10e-guided by and slide over,V said v cylindrical lmember and by coaction'therewith to'form` a dash pot substantiallysealed against entrance and exit of gases.

2. In a liquid fiow regulating device, the combination with a cup having a bottom outlet and an upwardly extending f member adapted to act yas a guiding piston,"ot` afloat having inte-gral therewitha cylinder adapted l to be guidedby said piston 'and providing abovesaid piston a space substantially sealed againstentrance and `exit of gases, whereby the movements of the float are substantially retarded by said piston. Y i

u 3. In a liquid flow regulating device, the

combination with a supply tubea'nd a cupy having anf outlet, of a float, and means vadaptT edto guide the oat in its' vertical movement, prevent tipping and provide a space below the central Vpart ofthe lfloatVv substantially sealedagainst entrance and eXit of gases and thus retard said vertical n iovements.V

l.' Ina-'liquid flowv :regulating device, the combination with v`av cup, of a cylindrical member therein having an inlet toreceive liquidl from the cup and a liquidputlet, anda hollowbodyloat having'in its bottom a 'ref cess into which said cyli-ndricalpmember ex-" tends and affords for the-.cup a -dashfpot guide providing 5a spacesubstantially sealed against the entrance and exit of gases.

5. In a liquid iiow regulating device, the

combination with a cup; ofahollowcylinl drical member therein having a substantially closed top, aV port through whichliquid flows intosaid vmember from the cupand a liquid outlet; and a float comprising a hollowbody ywhich said tubular member extends and provides aboveit a closed space substantially sealed against entrance and exit of gases, thereby affording a guide with which the lioat is in dash pot relation.

6. In a liquid fiow regulating device, the combination with a cup, of a feed tube, an outlet nozzle including a tubular member' within the cup having a closed upperend and provided with holes throughwhich liquid iows from the cup into the outlet nozzle, and float comprising an external shell and an internal cylinder having a closed top and which is slidable vertically on saidVV tubular member. K Y l Y 7. In a liquid flow regulating device, the, combination with va receiving cup open at its top and having an outlet in its bottom, a tubular member whose interiorl communicates withthe interior of the cup and which hasa liquid outlet, and a float comprising a hollow body having a centralv part extending over the tubular member and having also a depending annular part surrounding and 'slidable on the tubular member, whereby the tubular member and float are in dash pot relation.v v

V8. In a liquid flow regulating device for centrifuges, the combination with a receiving cup open at its top and having an out-` let in its bottom, a hollow tubular member positioned in the cup above said outlet and having lateral orificesV communicating with the interior of the cup4 above the cap botan upper hollow body extending over the enlarged upper member of the outlet tube and having also a depending annular hollow body surrounding and slidable on the enlarged upper member ofthe outlet tube,

Va downwardly extending feed tube having loosely fitting in and closing the top of the enlarged upper member .of the outlet tube. Y

In testimony of which invention, Ihave hereunto set my hand,'at Poughkeepsie, New York', on this 25 day of April, 1928.

BERT R. WRIGHT;

tom, a float comprising anupper hollow body extending overthe tubular member and a depending annular hollow body surrounding and slidable on the tubular member, and a downwardly extending feed tube having an outlet end positioned overY thel ioat and adapted to discharge liquid onto the topy of the float and thence laterally.

- throughtheannular spacebetween the pe- Yriphery of the f feed tube and the-top ofthe fioat, the float being adapted tocontactwith the outlet end of the feed tubetoprevent overflowing ofthe cup and to regulate the Vrate of inflow of liquidto the cup by the variation in the width Yof, said' annular space, the hollowltubular kmember having a closed` top spacedl from the lower: wall of the upper hollow body of the float.

9. In a liquid flow regulating` device for centrifuges, the combination with a receiving cup open at its top and havingy an orifice in its bottom, an outlet tube comprising acontracted lower neck ext-ending throughand below said orifice and an upper member of greater diametervwithin the cup having an annular shoulder resting on-the bottom of .the cup adjacentthe periphery of said ori- Y Y rac ice, said upper member of the outlet tube beingv provided with perforations above and" adjacent said shoulder, a float comprising 

